<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>bootstrap - 下拉框(select)系列</title>

    <script src="https://cdn.bootcss.com/jquery/2.1.1/jquery.min.js"></script>
    <script src="../js/bootstrap.js"></script>
    <link rel="stylesheet" href="../css/bootstrap.css" />
    <link rel="stylesheet" href="../css/bootstrap-theme.css"/>
</head>
<body>
    <form class="form-horizontal">
        <select>
            <option>未选择</option>
            <option>java</option>
            <option>C</option>
            <option>C#</option>

        </select>


    </form>
</body>
</html>